Scientific studies confirm that the temperature in closed environments can have a significant impact on the productivity, and that the “comfort zone” is located between 22°C and 25°C. The chart below, based on research from the Helsinki University of Technology’s ‘Effects of Temperature on Work Performance in Office Environments’, shows how the relative productivity changes with temperature.




"While fans are often used to cool people, they do not actually cool air (if anything, electric fans warm it slightly due to the warming of their motors), but work by evaporative cooling of sweat and increased heat conduction into the surrounding air due to the airflow from the fans. Thus, fans may become ineffective at cooling the body if the surrounding air is near body temperature and contains high humidity."